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This Geologic Time Scale provides a directory of links to web pages for each time interval.
 
The links focus on:
	 
		general information on the time period
		paleogeography for the period
		representative fossils of the period 
Help Maintain This Site
* Ma = million years ago 
Links to the other Geologic Time Scales on the web:
	 
Many of the links on the directory pages were found by members of the Spring 1998 "History of Life" course at San Francisco State University. 
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